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Recommended flow thru the new boiler is 10gpm.
Are those flows with the 0011 simply TOO high?
Most everyone suggests 1 circ/loop. Since it's rare that more than 2 zones call at one time, and zone 1 is easily the most active, what do you think of just adding another 007 on zone1?

beenthere: Original problem was the BANGing boiler. You may have seen that the mfr has agreed to replace it. During all of that, we discussed the possibility of low flow being the culprit. Don't know if low flow was the cause for the BANG, but after looking at it, most everyone agrees that flow thru the system is not adequate.